The Arctic climate: what to expect

Northern Norway is warmer than its latitude suggests. Thanks to the Gulf Stream, summer temperatures can reach 20–30°C, while coastal winters hover between 0 and –10°C. Tromsø's maritime subarctic climate shifts sharply through the year, from the darkness of the polar night to the low, intense light of late winter.

The Gulf Stream shapes Northern Norway's climate. This warm ocean current carries heat from the Caribbean to the Norwegian coast, keeping temperatures 10–15°C warmer than other places at the same latitude. While interior Alaska and Siberia freeze at –40°C, Tromsø's harbours remain ice-free all year.

Summer (June–August): temperatures typically range from 10 to 20°C, occasionally reaching 25°C or higher. Rainfall is moderate, and July is usually the driest month. Nights can feel cooler on the water than ashore.

Autumn (September–November): temperatures drop from around 10°C to close to freezing. The first snow falls on the mountains in October, marking the start of the northern lights season.

Winter (December–February): coastal temperatures hover between –5°C and +2°C. This is the polar night, and the northern lights are at their most active. Snowfall can be heavy.

Spring (March–May): temperatures rise from –5°C to 10°C. Snow conditions are good for skiing, and daylight hours increase fast. By late May, the midnight sun returns and the summer season begins.